Acknowledgements
We would like to thank Sarah Malik for her tireless effort and support with managing and the MPN database.
Author contributions
The study was conceived by AGH and VG. ES and AGH abstracted the data. DM, CM, HS, and VG provided study patients. AGH analyzed the data. AGH and VG drafted the manuscript. All authors reviewed and approved the final version of the manuscript.
Disclosure statement
VG has served on the advisory board of Novartis, Celgene, Pfizer, and Sierra Oncology; received research funding from Novartis and Incyte. All other authors do not have conflicts of interest to declare.